How easy it would be if every aircraft was equipped with a parachute. When the engine or engines quit running all that the pilot would have to do is deploy the parachute and hopefully gently come back to Earth. However, such is not currently the case for every commercial airliner that is flying today or those new aircraft that are being created for flights by air by our future generations.
Then again, if the aircraft explodes while in flight high above the Earth, as many of them apparently do, before they come to rest what could be several feet below ground that is something that I guess will never be prevented from happening. A few hundred people or more will be killed and the news people will report that tragic event.
Months or even years later an investigator for the Air Transportation Safety Board will maybe explain the cause for why so many people were killed. In the meantime, the relatives of the deceased will hire lawyers to sue the daylights out of that commercial air carrier. More often than not, poor maintenance of the aircraft is the reason why so many people were killed.
By the time that such a lawsuit reaches a court of law it is entirely possible that the loved ones of the deceased have also passed away and/or the evidence that was found by the investigator is at best doubtful, in regard to proving negligence on the part of the commercial air carrier in question.
When a commercial airline company is losing millions of dollars each month you better believe that the aircraft that are owned and operated by that company are not in the best repair. Fresh paint that is recently applied to the exterior of an aircraft is no assurance that the air frame will remain intact or that the mechanical equipment will function properly.
The point here is that when you are in an object that is high above the ground there is not a whole lot that can be done to prevent the loss of life, in the event of an accident. Then again, if every passenger was wearing a parachute and the aircraft ceased to function, well, the air frame could automatically come apart to allow those inside to deploy their parachute well in advance of reaching the ground.
In spite of ones best efforts to preserve Human life terrible things do happen. Aircraft will crash within the future and there is not a whole lot more to be done to prevent such events. If people were really meant to fly they would have wings and also fly like the birds in the sky.